ProgBasicsJavaBook7.1ComplexLoop09sumDigits

import java.util.Scanner;

public class E09sumDigits {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());
        int sum = 0;

        do {
            sum = sum + (n % 10);
            n = n / 10;
        } while (n > 0);

        System.out.println("Sum of digits: " + sum);


    }
}